import java.util.Calendar;
import java.util.Date;
public class Main {
    public static void main(String[] args) {

Calendar cal=Calendar.getInstance();
cal.set(1995,3,9);
long timeEndStart=cal.getTimeInMillis();
cal.setTime(new Date());
long timeEnd= cal.getTimeInMillis();
long 出生天数=(timeEnd-timeEndStart);
        System.out.println(":"+出生天数);


    }
}